I finished connecting/assembling/taping the rest of the run for the duct work going up to the L Room. I had to get a little creative with the pieces I had left, but it worked out well, and looks great! I'll post photos tomorrow since I'm off to bed (and I didn't take any photos yet anyways).
I also picked out a paint colour for the Office. Basically, I got the colour from my coworker's house. His kitchen/dining room are painted a really nice, mellow shade of grey-beige, so when I had to chip away a piece of drywall around a door (to fit a casing properly - while we were installing his new kitchen), I saved a piece of the painted drywall paper, and I got a colour match for it at Home Depot. He was supposed to ask his wife for the name of the colour for me, but I didn't want to wait forever (since he tends to take forever to get back to me when I ask him for something), so I didn't "steal" their colour, hahaha. Well, not *technically*.
The colour, oddly enough, is pretty close to the colour of unpainted drywall (the grey type), and it's a very similar shade to the darker grey-brown that will be going in the upstairs hallway, so it should blend-in quite well with the colours I have picked out so far.
I should also show you guys the green that will be used in the Living Room, since I've had that one picked out ages ago.